Chair



' F. GHICHESTER CHAIR.

Patented Dc. 29, 1885.

mun I ur L 7o a mi i .Nu mi f, t; x w *S 4 WITNESSES: INVENTOR @47MSEM/f@ 41M B n ATTORNEY N. PETERS.

UNITED 'STATES PATENT @trici-3,

FRANKLIN CHIGHSTER, OF POUGHKEEPSIE, NEW YORK.

CHAIR.

SPECIFICATION forming part of Letters Patent 1\To 333.393, datedDecember 29,1885.

(No model.)

To all whom t may con/cern.-

Be it known that I, FRANKLIN CHrcHEsTER, of Poughkeepsie, Dutchesscounty, and State of New York, a citizen of the United States, haveinvented a new and useful Improvement in Chairs; and I do declare thefollowing to be a full, clear, and exact description of the same,reference being had to the accompanying sheet of drawings, forming partof this specication.

This invention relates to an improvement in chairs; and the inventionconsists in combining with a chair, rockers, a metal spider, atie-strip, and spiral springs, constructed and arranged in the mannerhereinafter described, shown, and claimed.

In the accompanying sheet of drawings, Figure l is a sideelevation,partly in section. Fig. 2 is a front elevation, partly insection. Fig. 3 is a plan of spider.

Similar letters of reference indicate like parts in the several figures.

This invention pertains especially to that class of chairs known asrevolving7 and tilting7 chairs. The back, arms, seat, and pedestal maybe of any well-known form and construction, and therefore need noparticular description in this specification.

To the seat-frame A, and on its under side, are securely fixed tworockers, B, of wood or other material. These rockers may have anydesired curvature to adapt them to the purpose for which they aredesigned. A metal spider, C, is cast with two bearing-surfaces, a, arear stop, b, and braces c. To this spider is centrally Xed the ordinaryswivelscrew, d, which passes through-a corresponding nut, e, in thepedestal f. To one end of each of the bearing-surfaces a is xed one endof two tie-strips, D, the other ends of these strips being secured tothe rockers B. These tie-strips may be made of flat metal springs, or ofany other suitable material. To the braces c, and at right angles to thesame, are secured the lower ends of spiral springs E. The upper ends ofthese springs are secured to a cross-bar, g, extending from one rocker Bto the other.

Now, when my chair is constructed as above described, or substantiallyas described, itisenabled to turn or swivel on its base or pedestal byreason of the screw d, precisely as do other chairs with similarswivel-screws and pedestals; but as the chair is in this way revolved,the rockers B and the spider G, before described, of necessity revolvealso, so that in whatever direction the chair may be turned on itsswivel, it can be tilted or rocked, as the surfaces of the rockers Brest upon t-he bearingsurfaces a, which act as bases in a manner similarto the base of the wellknown base rocking-chair.

As the chair is rocked or tilted backward and forward, the spiralsprings E yield their elastic force, preventing thereby the too suddenrocking or tilting vmotion and assisting the chair to recover andmaintain its normal posit-ion on the spider, and the tie-strips Dprevent the rockers from working or trayeling backward and forward orsidewise from the surfaces of the bearings a. 1

To check the extent of the backward tilting or rocking of the chair isthe purpose of the rear stop, b. The limitation of the forward rockingor tilting of the chair is controlled by the forward ends of thebearings a, which act as stops by being brought in contact with thefront portions of the rockers B.

From the foregoing description it is obvious that a swivel rocking andtilting chair is, by theV arrangement, combination, and construction ofthe several part-s hereinbefore described, made at comparatively smallcost of greater strength and utility than are the ordinary swiveling andtilting chairs..

I do not broadly claim putting tie strips between the base and rockersof a base rocking-chair, nor interposing connecting-springs betweenthem, nor the use of stops in such connection.

Having now described myinvention, what I claim as new, and desire tosecure by Letters Patent, is-

1. The combination of the chair-seat frame and its connected rockerswith a spider having surfaces to receive the rockers, tie-stripsconnecting the rockers and spider, spiral springs interposed between theseat-frame and for the seat-frame, and a swivel-screw interposed betweenthe spider and base or pedestal, 1o substantially as described.

spider, and front and rear stops, substantially as described.

2. The combination of the chair-seat frame and its attached rockers witha base or ped- T p estal, a spider having surfaces to receive the FRABKLIN CHIGHESTER rockers, tie-strips connecting the rockers andWitnesses:

spider, spiral springs interposed between the M. F. FINNEGAN,

seat-frame and spider, front; and rear stops D. A. CARPENTER.

